taken from GV:
Ip Man (Donnie Yen) takes on disciple, Bruce Lee, and engage in
frequent sparring sessions to hone his skill after seeing great
potential. Meanwhile, a well-known property developer-cum-street
fighter played by American boxer Mike Tyson, challenges Ip Man in
an incredible showdown of Wing Chun kung fu versus heavyweight
boxing. In a never-seen-before union of Ip Man, Bruce Lee (revived
by computer graphics) and Mike Tyson, the past and the present
unite as a tribute to two of China’s greatest fighters.